Cutter for mowers.



L. BRILES. CUTTER FOR MOWERS. APPLICATION mm AUG. 10, 1916.

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LARKIN BRILES, 0F LAKECITY, CALIFORNIA.

CUTTER, FOR MOWERS.

Specification of Letters Patent.

Patented Mar. 13, 1917.

Application filed August 10, 1916. Serial No. 114,260.

To all whom it may concern:

Be it known that I, LARKIN BnILns, a citi zen of the United States, residing at Lake City, in the county of Modoc and State of California, have invented certain new and useful Improvei'nents in Cutters for Mowers. of which the following is a spgfication.

This invention relates to cutters for mowers and reaper-s, and has for its object the provision of a cutter in which the cutter bar and the blades may be removed from the pitnlan without disconnecting the pitman from the pitman bar so that the weight to be handled while sharpening the cutter will be minimized. Another object of the invention is to provide novel and efficient means for securing the cutter to the pitman bar.

The invention is illustrated in the accompanying drawings and will be hereinafter first fully described and then particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a perspective view of a cutter embodying my improvements;

Fig. 2 is a longitudinal section of the same;

Fig. 3 is a transverse section 3-3 of Fig. 2;

Fig. 4: is a detail perspective view of the detent or looking pawl which is utilized to prevent loosening of the bolt by which the pitman bar is fastened to the cutter.

In the annexed drawings, the reference numeral 1 indicates the cutter bar' which may be of the usual dimensions and to which the blades or cutters 2 are secured in the usual manner. At its pitman end, the cutter bar 1 is provided with a tenon 3 which is adapted to enter a suitable mortise in the sickle head 4: and over the cutters 2, at the said end of the bar, I secure a clamping bar or plate 5. The clamping bar or plate 5 is constructed in its upper side with a plurality of series of notches or serrations, as shown at 6, and the sickle head 4 is constructed with an elongated portion 7 adapt- ,ed to extend over the said clamping bar and provided on its under side with a plurality of teeth 8 adapted to engage the notches or serrations in the clamping bar. Longitudinal movement of the pitman bar and of the clamping bar relative to each other is efon the line fectually prevented by the described con-- struction and the sickle head is securely fastened in place by a bolt 9 inserted through the sickle head and the clamping bar into the cutter bar, as shown most clearly in Fig. 3. The said bolt is provided near its upper end or angular head 10 with a ratchet 11 which is engaged by the tooth 12 of a detent 13 consisting of a resilient plate secured rigidly to the longitudinal flange 1% pro vided at the back edge of the sickle head. The detent is provided with an extension or handle member 15 by which it ma be readily released from the latch when it is necessary to withdraw the bolt. The longitudinal flange 14:, at the rear edge of the sickle head, reinforces the sickle head in addition to providing a support for the detent and on the said flange is provided a spherical enlargement or ball 16 which is adapted to fit within a socket in the end of the pitman (not shown) so that when the pitman is reciprocated, the motion will be imparted to the sickle head and the cutter. The ball and socket connection between the sickle head and the pitman also accommodates the relative angular movement of the power-receiving end of the pitman so that the cutter will be permitted to operate continuously in a horizontal plane. The ball and socket connection with the pitman also permits the cutter to accommodate itself to the irregu larities in the surface of the field over which the machine may be drawn. Rivets or similar devices 17 are provided at intervals to secure the cutters and the clamping bar to the cutter bar, as shown and as will be readily understood.

The machine is drawn over the field in the usual manner and the cutter bar is reciprocated through the motion imparted to the pitman connected therewith so that the cutters will be drawn rapidly across the stalks of grain and sever the same. readily noted that when it is necessary to sharpen the cutters, the entire cutting apparatus need not be withdrawn from the machine. The detent is disengaged from the ratchet, after which the bolt 9 is withdrawn, thereby permitting separation of the cutter from the sickle head and leaving the said head connected with the pitman. The cutter bar, with the blades attached thereto may be very easily withdrawn from the guard fingers and the only parts which it will be necessary for the operator to handle will be It will be the cutter bar and the cutters secured thereto. In assembling the cutter bar and cutters with the sickle head, the tenon 3 is first inserted in the mortise provided therefor in the head and the cutter bar is then moved upwardly so as to etlect engagement between the notches 6 and teeth 8, after which the bolt 9 is turned home. It will be readily noted that inasmuch as the sickle head abuts the end of the cutter bar and the clamping bar, relative oscillation of the sickle head upon the other parts will be obviated and as there is a tenon and mortise engagement between the sickle head and the end of the cutter bar, a single bolt inserted through the cutter bar, clamping bar and the lateral extension of the sickle head sultices to rigidly secure the parts together. As only a single bolt is needed to secure the parts together it is evident that the removal of a single nut is sutlicient to permit the withdrawal of the cutter from the sickle head when it is necessary to sharpen the cutter so that the work of withdrawing and replacing the cutter is greatly facilitated. In order to accommodate the slight circular movement of the cutter bar in assembling it with the sickle head, the tenon 3 is slightly arched, as shown most clearly in Fig. 2.

The device is exceedingly simple and may be readily applied to any cutter bar now in use.

Copies of this patent may Having thus described the invention, what is claimed as new is:

1. The combination of a cutter bar, a sickle head having one side abutting the end of the cutter bar and having a tenon and mortise engagement therewith, the sickle head having a lateral extension projecting from the upper rear portion of said side over the cutter bar, means for preventing relative longitudinal movement between the cutter bar and the extension, and a fastening device securing said extension to the cutter bar.

2. The combination of a cutter bar, cutters secu ed upon said bar, a clamping bar secured over the cutters, a sickle head having one side abutting the end of the cutter bar, the clamping bar and the cutter, and having a tenon and mortise engagement with the cutter bar, the sickle head being further provi ded with a lateral extension projecting from the upper rear portion of its side over the clamping bar, means for preventing relative longitudinal movement between the said extension and the clamping bar, and a single bolt inserted through the said extension, the clamping bar, the cutter and the cutter bar to rigidly secure the extension to the cutter bar.

In testimony whereof I aflix my signature.

LAB-KIN BRILES. a 8.

be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

